actually i don´t do very much editing at all , only sometimes i play arround with the filters or super saturation* and negatives* but thats all, i try to keep it as natural as possible usually .
i have PScs4 and what i usually do is go to image->curves and then do brighter or darker to incrase the saturation or point out a special part of the image like the front part of the car or something like that , and then i do the levels "image -> level" it´s basicly saturation adjusting .
mostly thats all i don´t play arround with the shadows or effect´s but sometimes i try to find a nice photofilter* "image-> photofilter" and i choose one which fit´s the most .